Electrochemical regeneration of chromium(II). Alkenylation of carbonyl compounds
Electrochemical alkenylation of aldehydes using an Al sacrificial anode in the presence of Cr(II)/Ni(II) catalysts afforded the corresponding allyl alcohol derivatives in good to moderate yields.
Ni/Cr/Al multi-metal redox-mediated alkenylation of aldehydes
Alkenylation of aldehydes mediated by a catalytic amount of Cr(II)/Ni(0), using aluminium as an electron source, was performed to afford the corresponding allyl alcohol derivatives in good to moderate yields.
TRIS(2-METHYLPHENYL)PHOSPHORANE, A MODIFIED SEYFERTH-WITTIG REAGENT FOR THE STEREOSELECTIVE SYNTHESES OF Z-ALLYLTRIMETHYLSILANES
The Wittig reactions between title β-silylphosphorus ylide and aliphatic aldehydes give selectively Z-allyltrimethylsilanes with minimal formation of vinylation products.